10 mm x 19 mm x 7 mm ISB 63800 deep groove ball bearings

The online 10 mm x 19 mm x 7 mm ISB 63800 deep groove ball bearings parts store gives you immediate access to a selection of more than 1.4 10 mm x 19 mm x 7 mm 2200 Reference Thermal Speed Rating (Oil)7 million new, used, remanufactured. Lamar parts manufacturing company 1900 Reference Thermal Speed Rating (Grease)

What is 63800 bearing cross reference？